add workflow.

.github/workflows/main.yml

@@ -0,0 +1,28 @@
+# This is a basic workflow to help you get started with Actions
+
+name: Docker
+
+# Controls when the action will run. Triggers the workflow on push or pull request
+# events but only for the master branch
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master, docker-swarm ]
+
+# A workflow run is made up of one or more jobs that can run sequentially or in parallel
+jobs:
+  docker:
+    # The type of runner that the job will run on
+    runs-on: ubuntu-latest
+
+    # Steps represent a sequence of tasks that will be executed as part of the job
+    steps:
+    # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
+    - uses: actions/checkout@v2
+
+    # Use docker to handle dependencies and prepend executables to PATH
+    - name: Test Quickstart (defaults)
+      run: |
+        ./generate-Dockerfile.sh
+        ./start-local.sh -p 8848